npx pio-mcp dashboard

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That's the install. Open a terminal anywhere — your laptop, a fresh VM, a coworker's machine — type one line, and you get a React dashboard wired to PlatformIO Core. From there an LLM can compile firmware, flash it to a real board, and stream serial back to the same browser tab.

platformio-mcp v2.0.0 shipped to npm. Here's why and how.

The gap

LLMs are stupidly good at writing firmware. Hand Claude a datasheet and it'll spit out C++ that compiles. Hand it the FreeRTOS docs and it'll wire up a queue without breaking a sweat.

The next step always falls apart.

"Great, now flash it to the ESP32 sitting on my desk."

You get back a markdown wall of "first install pyenv, then bootstrap a venv, then pip install platformio , then check your USB-C cable supports data, then make sure the right udev rule is in place on Linux, then..." It's a setup-doc generator. The agent has read every PlatformIO tutorial ever written.…